Restarting The Watch; Resetting All Default Settings; Maximizing Battery Life - Garmin FORERUNNER 255 Series Owner's Manual

Restarting the Watch

If the watch stops responding, you may need to restart it.
NOTE: Restarting the watch may erase your data or settings.
1 Hold LIGHT for 15 seconds.
The watch turns off.
2 Hold LIGHT for one second to turn on the watch.

Resetting All Default Settings

Before you reset all default settings, you should sync the watch with the Garmin Connect app to upload your
activity data.
You can reset all of the watch settings to the factory default values.
1 From the watch face, hold UP.
2 Select System > Reset.
3 Select an option:
• To reset all of the watch settings to the factory default values and save all user-entered information and
activity history, select Reset Default Settings.
• To delete all activities from the history, select Delete All Activities.
• To reset all distance and time totals, select Reset Totals.
• To reset all of the watch settings to the factory default values and delete all user-entered information and
activity history, select Delete Data and Reset Settings.
NOTE: If you have set up a Garmin Pay wallet, this option deletes the wallet from your watch. If you have
music stored on your watch, this option deletes your stored music.

Maximizing Battery Life

You can do several things to extend the life of the battery.
• Turn off activity tracking
• Reduce the backlight timeout
• Reduce the backlight brightness.
• Set up the battery saver preferences in the power managerxref customizing battery saver.
• Turn off Bluetooth wireless technology when you are not using connected features
Features, page 71).
• Stop broadcasting heart rate data to paired Garmin devices
• Turn off wrist-based heart rate monitoring
NOTE: Wrist-based heart rate monitoring is used to calculate vigorous intensity minutes and calories burned.
• Limit the smartphone notifications the device displays
• Turn off the pulse oximeter feature
• When pausing your activity for a longer period of time, use the Resume Later option
page 3).
• Select the Smart recording interval
• Use UltraTrac GPS mode for your activity
• Use a watch face that is not updated every second.
For example, use a watch face without a second hand
94
(Turning Off Activity Tracking, page
(Changing the Screen Settings, page
(Turning Off the Wrist-based Heart Rate Monitor, page
(Turning Off the Wrist-based Heart Rate Monitor, page
(System Settings, page
(GPS Settings, page
38).
88).
(Broadcasting Heart Rate Data, page
(Managing Notifications, page
87).
84).
(Customizing the Watch Face, page
(Phone Connectivity
52).
52).
72).
52).
(Stopping an Activity,
14).
Troubleshooting